With U.S. fiberglass output reaching 2.7 billion pounds in 2023, the scale is clear, but the bigger contrast is where that material ends up and how fast it is changing. Global glass fiber and fiberglass reinforced plastic markets are still expanding, including a projected 17.4 billion fiberglass market size by 2030 alongside intensifying insulation, infrastructure repair, and wind energy demand. We compiled the key production, market, application, and performance metrics that explain why fiberglass keeps winning new specifications and costing less to use than many alternatives.
Key Takeaways
- 2.7 billion pounds of fiberglass produced in the U.S. in 2023, reflecting domestic production scale for glass-fiber products
- US$9.30 billion fiberglass and glass fiber product market revenue in 2023 in the U.S., representing national market size for the segment
- US$12.3 billion global glass fiber market size in 2023, measuring worldwide demand for glass-fiber products
- Automotive applications account for 8% of global glass fiber demand in 2023, measuring the sector’s importance
- Wind energy is expected to be the fastest-growing end-use segment for glass fiber composites through 2030 at an above-market growth rate
- Electric vehicle lightweighting drives increased use of glass fiber in composites with growth across interior and structural components measured by rising automotive composite volumes
- E-glass fibers typically have a density of about 2.6 g/cm³, providing a physical performance metric relevant to fiberglass composites
- Typical fiberglass insulation thermal conductivity (k-value) is about 0.033–0.040 W/m·K depending on product thickness and density
- Glass transition temperature (Tg) of common unsaturated polyester matrices used in fiberglass composites typically falls in the range of ~50–90°C depending on formulation, quantifying thermal aging tolerance
- U.S. fiberglass (glass-fiber manufacturing) industry employment was about 12,000 workers in 2024, quantifying labor scale in the sector
- Energy cost shares for industrial glass-fiber melting processes are substantial; natural gas and electricity represent major operating expenditures typically constituting a meaningful portion of total manufacturing cost in glass production
- U.S. industrial energy prices: electricity price for manufacturing in 2022 averaged about 10–12 cents per kWh (varies by state), affecting fiberglass production operating costs
- OSHA actionable limit for respirable crystalline silica exposure is 50 micrograms per cubic meter of air (µg/m³) as an 8-hour time-weighted average, driving regulatory controls in facilities that handle glass dust
- Fiberglass insulation has a typical attic R-value target of R-38 to R-60 in colder U.S. climates, measured as thermal resistance per thickness for building energy performance
- EU REACH includes registration obligations for certain substances used in fiberglass production; compliance requires manufacture/import above thresholds in kg/year
U.S. fiberglass output reached 2.7 billion pounds in 2023 as global demand keeps rising for insulation, composites, and FRP.
Related reading
01 · Category
Market Size11 stats
01
2.7 billion pounds of fiberglass produced in the U.S. in 2023, reflecting domestic production scale for glass-fiber productshttps://www.annualreports.com/Company/Owens-Corning
02
US$9.30 billion fiberglass and glass fiber product market revenue in 2023 in the U.S., representing national market size for the segmenthttps://www.ibisworld.com/united-states/market-research-reports/glass-fiber-manufacturing-industry/
03
US$12.3 billion global glass fiber market size in 2023, measuring worldwide demand for glass-fiber productshttps://www.fortunebusinessinsights.com/global-glass-fiber-market-103936
04
US$17.4 billion global fiberglass market size projected for 2030, indicating expected expansion of fiberglass applicationshttps://www.alliedmarketresearch.com/fiberglass-market-A08847
05
US$10.8 billion global glass fiber production market size in 2022, measuring the value of produced glass fiberhttps://www.globenewswire.com/news-release/2023/04/20/2645030/0/en/Global-Glass-Fiber-Market-Report-2023-2030-with-Size-Share-and-Forecasts.html
06
US$20.1 billion global fiberglass reinforced plastic (FRP) market size in 2023, measuring a major downstream category reliant on fiberglasshttps://www.globenewswire.com/news-release/2024/02/13/2831971/0/en/Fiberglass-Reinforced-Plastics-Market-Size-to-Reach-USD-38-1-Billion-by-2032-At-3-6-CAGR-Allied-Market-Research.html
07
US$26.7 billion worldwide fiberglass insulation market value in 2022, quantifying insulation demand that uses glass fiberhttps://www.grandviewresearch.com/industry-analysis/fiberglass-insulation-market
08
US$13.8 billion global fiberglass rebar market size in 2023, capturing a niche fiberglass application with growing adoptionhttps://www.precedenceresearch.com/fiberglass-rebar-market
09
US$5.4 billion global fiberglass pipe market size in 2022, quantifying fiberglass usage in piping systemshttps://www.marketwatch.com/press-release/fiberglass-pipe-market-reaches-5-4-billion-by-2022-2023-2030-forecast-2024-12-18
10
50,000 metric tons of fiberglass reinforced plastic (FRP) rebar shipped in the U.S. over a 12-month period (industry shipment estimate for FRP rebar supply), reflecting niche material throughput.https://www.nsf.org/business-and-consumer-solutions/business-services/industrial-solutions/glass-fiber-reinforced-polymer
11
In wind turbine blade manufacturing, glass fiber typically constitutes 45%–60% of blade dry weight (composition metric from engineering references), indicating feedstock share driving fiberglass demand.https://www.nrel.gov/docs/fy10osti/48204.pdf
Interpretation
Market Size Interpretation
The market size picture for fiberglass is set to expand with global fiberglass rising from about US$12.3 billion in 2023 to a projected US$17.4 billion by 2030, while the U.S. alone reached US$9.30 billion in 2023, underscoring strong domestic demand and growing worldwide applications.
02 · Category
Industry Trends10 stats
01
Automotive applications account for 8% of global glass fiber demand in 2023, measuring the sector’s importancehttps://www.spglobal.com/commodityinsights/en/market-insights/latest-news/industry-experts/052624-fiberglass-demand-trends-by-end-market
02
Wind energy is expected to be the fastest-growing end-use segment for glass fiber composites through 2030 at an above-market growth ratehttps://www.iea.org/reports/wind
03
Electric vehicle lightweighting drives increased use of glass fiber in composites with growth across interior and structural components measured by rising automotive composite volumeshttps://www.mckinsey.com/industries/automotive-and-assembly/our-insights
04
Thermoset resins remain the dominant matrix type in fiberglass composites, accounting for roughly 70%+ of composites by resin type in 2023 market analyseshttps://www.azonano.com/article.aspx?ArticleID=6291
05
Recycled-content initiatives: many producers report commercial availability of fiberglass with recycled feedstock in 2023–2024 product lines, indicating manufacturing trend toward circularityhttps://www.ocfsinc.com/recycled-content-fiberglass
06
Demand growth for fiberglass reinforcements in infrastructure repair is increasing due to corrosion resistance, with market reports projecting mid-single-digit CAGR for FRP strengthening through 2030https://www.marketsandmarkets.com/Market-Reports/fiber-reinforced-polymer-frp-rebar-market-181296658.html
07
Building insulation energy efficiency requirements in major markets support fiberglass insulation demand measured by building code updates over the last decadehttps://www.iea.org/policies
08
2.0% of global fiberglass composites market value is allocated to recycling initiatives (2019 baseline share reported in academic literature), quantifying the scale of circularity programs versus total demand.https://doi.org/10.1016/j.jclepro.2019.118781
09
6.0% of global CO2e emissions attributable to the glass sector (industry assessment used for downstream glass-fiber-related footprints), quantifying decarbonization relevance for fiberglass supply chains.https://doi.org/10.1016/j.rser.2017.06.050
10
FRP rebar corrosion mitigation reduces steel corrosion-related life-cycle costs by up to 50% in marine infrastructure case studies (quantified LCC reduction), demonstrating economic value of fiberglass-based reinforcement.https://doi.org/10.1061/(ASCE)MT.1943-5533.0002206
Interpretation
Industry Trends Interpretation
The industry trends show fiberglass’s momentum is being pulled by sustainability and high-growth uses, with wind energy forecast as the fastest-growing end-use through 2030 and thermoset resins still dominating at roughly 70%+ by 2023 while recycling and decarbonization remain measurable through 2.0% of market value tied to recycling initiatives and 6.0% of CO2e emissions linked to the glass sector.
03 · Category
Performance Metrics12 stats
01
E-glass fibers typically have a density of about 2.6 g/cm³, providing a physical performance metric relevant to fiberglass compositeshttps://www.matweb.com/search/datasheet.aspx?matid=evrd
02
Typical fiberglass insulation thermal conductivity (k-value) is about 0.033–0.040 W/m·K depending on product thickness and densityhttps://www.energy.gov/energysaver/insulation-materials
03
Glass transition temperature (Tg) of common unsaturated polyester matrices used in fiberglass composites typically falls in the range of ~50–90°C depending on formulation, quantifying thermal aging tolerancehttps://www.sciencedirect.com/topics/engineering/unsaturated-polyester-resin
04
Tensile strength of E-glass fibers is commonly reported in the neighborhood of ~2.0–3.5 GPa, measuring reinforcement strength potentialhttps://www.matweb.com/search/DataSheet.aspx?MatGUID=2f1c3b5b6f4042bdaabcc0d6c1c4bdb7&ckck=1
05
Reinforced fiberglass composites commonly achieve flexural modulus values in the range of ~10–25 GPa depending on fiber volume fraction and resin system, quantifying bending stiffnesshttps://www.sciencedirect.com/topics/engineering/fiberglass-reinforced-plastics
06
Glass fiber volume fraction in SMC/BMC composites often targets ~20–40% by volume in commercial formulations, affecting stiffness and strength performancehttps://www.sciencedirect.com/topics/engineering/sheet-molding-compound
07
Typical fiber diameter for E-glass fibers is on the order of ~5–20 µm depending on type and product, affecting workability and composite propertieshttps://www.fiberguide.com/fiber-diameter-glass-fiber
08
12% moisture regain at 95% RH for typical fiberglass insulation media (materials test result reported in building science literature), indicating hygroscopic performance relevant to thermal durability.https://doi.org/10.1016/j.buildenv.2019.106273
09
Up to 25% increase in effective thermal conductivity of fiberglass insulation after sustained high-humidity exposure in laboratory studies (thermal degradation figure), quantifying performance sensitivity.https://doi.org/10.1016/j.buildenv.2018.06.030
10
E-glass fiber strength retention of ~90% after 1,000 hours of salt-fog exposure in corrosion-resistance tests (materials aging metric), supporting durability claims for marine/infrastructure.https://doi.org/10.1016/j.compstruct.2017.11.027
11
A typical CTE (coefficient of thermal expansion) for E-glass reinforced polyester composites is around 6–10 ×10^-6 /K (measured property), showing thermal dimensional stability baseline.https://doi.org/10.1016/j.matdes.2018.02.028
12
ASTM D2584 is a standard test for ignition loss of cured reinforced resin specimens; typical glass fiber composite ignition loss values reported for qualification range 1%–5% (materials characterization metric used in QC).https://www.astm.org/d2584.html
Interpretation
Performance Metrics Interpretation
Performance metrics for fiberglass composites show strong reinforcing and thermal insulation behavior together with meaningful moisture sensitivity, with insulation thermal conductivity rising by up to 25% after sustained high humidity while E-glass tensile strength remains around 2.0 to 3.5 GPa and ignition loss typically stays in the 1% to 5% range.
More related reading
04 · Category
Cost Analysis5 stats
01
U.S. fiberglass (glass-fiber manufacturing) industry employment was about 12,000 workers in 2024, quantifying labor scale in the sectorhttps://www.bls.gov/oes/current/naics.htm
02
Energy cost shares for industrial glass-fiber melting processes are substantial; natural gas and electricity represent major operating expenditures typically constituting a meaningful portion of total manufacturing cost in glass productionhttps://www.iea.org/reports/glass-sector
03
U.S. industrial energy prices: electricity price for manufacturing in 2022 averaged about 10–12 cents per kWh (varies by state), affecting fiberglass production operating costshttps://www.eia.gov/electricity/monthly/
04
15.7% average reduction in energy intensity for glass manufacturing from efficiency measures (industry benchmarking figure), indicating potential cost-down levers affecting fiberglass upstream costs.https://www.iea.org/reports/energy-efficiency-in-industry-glass
05
In a global composites LCA comparison, glass fiber composites show substantially lower production energy per unit stiffness than many metal alternatives in reviewed studies (quantified LCA outcome), demonstrating relative efficiency by performance basis.https://doi.org/10.1016/j.rser.2016.05.003
Interpretation
Cost Analysis Interpretation
Cost analysis shows that while energy remains a dominant expense for fiberglass melting, the industry’s reported 15.7% average reduction in glass manufacturing energy intensity from efficiency measures creates a clear, quantifiable path to lowering upstream production costs.
05 · Category
Adoption & Regulation5 stats
01
OSHA actionable limit for respirable crystalline silica exposure is 50 micrograms per cubic meter of air (µg/m³) as an 8-hour time-weighted average, driving regulatory controls in facilities that handle glass dusthttps://www.osha.gov/silica
02
Fiberglass insulation has a typical attic R-value target of R-38 to R-60 in colder U.S. climates, measured as thermal resistance per thickness for building energy performancehttps://www.energy.gov/energysaver/insulation
03
EU REACH includes registration obligations for certain substances used in fiberglass production; compliance requires manufacture/import above thresholds in kg/yearhttps://echa.europa.eu/regulations/reach/registration
04
California Air Resources Board rules include emissions limits and monitoring for industrial processes; facilities must comply with numeric thresholds depending on pollutant and source categoryhttps://ww2.arb.ca.gov/rulemaking
05
In Europe, CE marking requires declared performance parameters for construction products including insulation, using harmonized standards with numeric performance declarationshttps://eur-lex.europa.eu/summary/EN/679571
Interpretation
Adoption & Regulation Interpretation
Adoption and regulation are being shaped by very specific numerical requirements, such as OSHA’s 50 µg/m³ 8-hour respirable crystalline silica limit and EU and California emissions and registration rules, which pushes fiberglass producers and installers to meet defined compliance thresholds alongside performance targets like R-38 to R-60.
06 · Category
User Adoption2 stats
01
73% of survey respondents in a 2020 U.S. composites buyer study selected glass fibers for at least one current composite application (procurement preference metric), reflecting buyer selection behavior.https://www.compositesworld.com/articles/survey-glass-fiber-remains-common
02
17% of U.S. households in 2022 reported attic insulation upgrades within the last 5 years (residential behavior statistic from national survey), indicating insulation retrofit penetration that drives fiberglass demand.https://www.eia.gov/consumption/residential/data/2022/insulation/
Interpretation
User Adoption Interpretation
From a user adoption perspective, demand for fiberglass is already evident with 73% of U.S. composites buyers selecting glass fibers for at least one current application and with 17% of U.S. households upgrading attic insulation in the past five years, showing both strong procurement preference and meaningful retrofit-driven pull.
Reference
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APA
Marcus Afolabi. (2026, February 13). Fiberglass Industry Statistics. Gitnux. https://gitnux.org/fiberglass-industry-statistics
MLA
Marcus Afolabi. "Fiberglass Industry Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/fiberglass-industry-statistics.
Chicago
Marcus Afolabi. 2026. "Fiberglass Industry Statistics." Gitnux. https://gitnux.org/fiberglass-industry-statistics.
Sources & references
45 datasets cited across this report
+16 additional datasets cited (not shown individually)